Ronald Zitza

Career

Season	Level	Series / class	Pos.	Team / car / races
2014	GT	IMSA United SportsCar Championship, Class GTD	132.	Mühlner Motorsport, Porsche 911 GT America (991) 1 of 11 races
2008	GT	Grand-Am Sports Car Series, Class GT	127.	Terra Firma Motorsports, Porsche 911 GT3 Cup (997) 1 of 13 races
2007	GT	Grand-Am Sports Car Series, Class GT		Goldin Brothers Racing, Mazda RX-8 GT 1 of 13 races
2006	GT	Grand-Am Sports Car Series, Class GT	103.	TZ Motorsports, Porsche 911 GT3 Cup (996) 1 of 13 races
2005	GT	Grand-Am Sports Car Series, Class GT	100.	Team Sahlen, Porsche 911 GT3 Cup (996) 1 of 14 races
2004	GT	Grand-Am Sports Car Series, Class GT	95.	GT Technologies, Porsche 911 GT3 Cup (996) 1 of 12 races
2003	GT	Grand-Am Sports Car Series, Class GTS		Jack Lewis Enterprises, Porsche 911 GT3 Cup (996) 1 of 12 races Gunnar Racing, Porsche 911 GT1 G-99 1 of 12 races
2001	GT	Grand-Am Sports Car Series, Class GT	135.	Broadfoot Racing, Porsche 911 GT3-R (996) 1 of 10 races Gunnar Racing, Porsche 911 GT3-RS (996) 0 of 10 races
2000	GT	Grand-Am Sports Car Series, Class GTU	43.	GT Technologies, Porsche 911 GT3 Cup (996) 1 of 10 races
	GT	Grand-Am Sports Car Series, Class AGT	21.	Comer Racing, Chevrolet Camaro (IV) TransAm 1 of 10 races 1 win

• Main series of the season: highest share of races contested; series with few races and single races count less.
• 1. Positions 1–6 and wins.